update to proxmox-sys 0.2 crate

- imported pbs-api-types/src/common_regex.rs from old proxmox crate
- use hex crate to generate/parse hex digest
- remove all reference to proxmox crate (use proxmox-sys and
  proxmox-serde instead)

Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>

proxmox-rrd/examples/prrd.rs

@@ -11,7 +11,7 @@ use proxmox_router::cli::{run_cli_command, complete_file_name, CliCommand, CliCo
 use proxmox_schema::{api, parse_property_string};
 use proxmox_schema::{ApiStringFormat, ApiType, IntegerSchema, Schema, StringSchema};
 
-use proxmox::tools::fs::CreateOptions;
+use proxmox_sys::fs::CreateOptions;
 
 use proxmox_rrd::rrd::{CF, DST, RRA, RRD};